Five-phase two-stroke internal-combustion engine



July 7, 1925.l

L. A. NOEL FIVE-PHASE TWO-STROKE QN'IEIRNAL COMBUSTION ENGINE Filed May 11, 1922 Sheets-Sheet4 1 Fig] July 7, 1925. 1,544,771

L. A. NOEL FIVE-PHASE TWO-STROKE INTERNAL COMBUSTION ENGINE Filed nay 11, 122 s sant-sheet 2 lillyl 7, 192s. 1,544,771

L. A. NOEL FIVE-PHASE TWO-STROKE INTERNAL GOMBUSTION ENGINE Filed May 11, 1922 3 Sheets-Sheet 3 Patented July 7, 1925.

Louis ANDR NOEL, or PARIS., lriuiNciiQ rivn-rrrasr. :vwo-smoke rNrnRNAL-GOMBUSTION iineiivis. l

Application filed. May 11, 1323. Serial No.`1560,212.

To all fui/z om t may concern Be it known that I, Louis ANDR Noiiri, a citizen of the French `Republic, residing at 29 bis Rue Saint-Didier, Paris, France, have invented new and useful Improvements in Five-Phase Two-Stroke Internal-Combustion Engines, of which the following is the specification.

' y This invention relates .to an internal com bustion engine the cycle of which comprises ive phases and is completed in'two strokes.

It is adapted to increase the thermal efficiency of internal combustion engines, whilst simplifying them concerning the parts and particularly to ensuretheir 'operation with any fuels and especially' liquid andfeven Y solid heavy fuels.

It is also adapted to ensure the spon taneous ignition of the explosive charge at yany working speed, without heating, with any fuel and by doing away with any vpremature ignition and any knocking.

The present invention consists essentially infdevising the cylinders and the pistons of the Vsaid internalcombustion engines, so as to obtaintherein at each downward Vstroke of the pistons: 1"-a short expansion of the combustion gases; 2-an exhaust Vat very high pressure and very great speed, but of a lportion only of the said gases; 30--the creation within-the cylinder, of' a partial vacuum, resulting jat tlie'same time from the rapid exhaust of -the gases and from the displacement of the piston; lotlie suction of a volume of fresh fuel or gas very much less than the capacityv of the'cylinder, then at each reascending stroke., compression of the total volume of the charge which is, consef quently, largely. ,composed of residual gases and, in 'less quantity, ofl fresh fuel.

It consists also in determining the :formar y t 1 with solid fuels,"provided they' are, in this tion and composition of the gaseous mass or fuel, so that a portion of the residual gases of the previous explosion is kept in thecylindei' and is subjected therein to ai rdisassociation fof its elements, created iby the v present device itself in the following manner. Subsequently to A'the ,veryviolent eX- haust determined at a high pressure by the machine constructed in accordance ywith .this invention, the gases left withinthe cylinder are considerablyv cooled and, consequently, they are subjected to a `movementof con-V traction tending vto bring them backward, but duringy the execution-Of this movement,v

the piston.

`thepiston continues to -move and increases the inner volume of the enclosed container constituting at this moment the cylinder and the saine gases are immediately urged to alter again the direction of their displacement .and rto move again forward, whilst being reheated by ,the walls. These' gases are thus subjectedr to violentl and ,repeated agitations resulting in an unbalancing of their atomic forces and the separation or dissolution of their elements.

The oXygen, hydrogen and carbon thus released the said dissociation -of carbon dioxide, water vapour or. carbon monoxide, residue of the preceding explosion, become capable of combining again with the` other elements of the freshfuel.

Y The mixture of all these elements'which have just been separated or released from each other is thus largely facilitated and S acquires a perfect homogeneity owing tothe compression which follows, upon returnr Of vThey whole of the charge becomes by these means a very homogeneous mixture of combustion supporting vagent and rfuel in the nascent state, eminently suitable for the` combustion or explosion which is, by this fact, rendered compulsorily spontaneous after a determined compression. It is accompanied by a moderate temperature, whilst its breaking effects are entirely deadened by the presence of a large quantity of a neutral gas whichis the nitrogen of the air sucked in. Y

" The phenomenon of dissociation.. determined by the invention beingparticularly :of mechanical order and independent from the volatility'oflthe fuel used, it will always take Yplace in'all cases, as well'with-volatile fuelsV as with heavy fuels, ,itwill -even occur two parts sliding on each other; one of these two parts comprises the` body of the piston and is connected to the connecting rod; the

otherV iscapable of sliding on the first one y according to an-extent `limited by stops between Ywhich it remains free for certain portions of its stroke inthe'cylinder. When Y these two parts are moved together, they present a fluid tightjoint. On the contrary,

when they move apart by their sliding movement, they leave between them an interval through which pass the gases.

The said cylinder is provided with a series of exhaust ports and with a seriesofsuc-V tion or inlet ports, which are alternately opened or closed by'either part of the piston. rlhe said invention consists moreover in a number of other arrangements whichv are preferably used with those just indicated. The invention relates more particularly to certain forms of carrying out the described arrangements., without being limited thereto, and on the other hand, as new industrial products, it relates to machines to which these arrangements are fitted.

rlhis invention will be clearly understood by the following description, which is given by way of example only, with. reference to the accompanying` drawing in which:

Fig. l is an axial section of an engine made in accordance withy this invention.

2' is an outer view of the part ofV the pistonconnected to the link. v

Fig. 3 isV partly an outer view, partly a sectional view ofV the part of the piston adapted to slide on that shown in Fig. 2. lFig. 4s is an elevation and a plan view of the stop ring limiting the sliding stroke of vthe parts of the piston on each other.

Figs. 5 to 9` are: sectional and outer views, 4with portions cut away, of an engine constructed in accordance with this invention, each of these i'igures showing one ofthe live phases of the cycle ofthe invention.

Fig. 10 is a view of the diagram of the cycle;

- In Fig; 1, thev cylinder a perforated with exhaust ports elandA inlet ports a2 is illustrat-edi in axial section as well as the piston body Bf which is provided at the head end w-ith areduced portion Zi having grooves l1 therein. The shoulder intermediate the piston and its reducedVV end. isl inclined for; a purpose which will hereinafter appear. Towardsuthe top of the reduced endv of the pistonisformed a circula-r channel inwhich is' arranged a stop ring b2. A sleeve-like piston member b3 is slidably mounted on the reduced: end of the piston body The movement of the .member b3, in one direction, is limited by` the abutment o2 of the piston b and, in theopposite direction, by the seat b4 on which bears in a fluid-tight manner the lower endV b5' of the member 3.

The member b3 acts in the samefway as an automatic slide-valve controlling passage of' fluid" to and from theV cylinder shown in Figs. 5to-9;

In Fig; 5 the piston is shown at 'the time of the explosion, the part B of the piston f will? move down driven by the gases; the

member b3, owing toits adherence to the cylinder, remains 'stationary until the abutment' b? engages andfactuates it,

In Fig. 6, the annular space between the y piston body B and the member b3 is. opposite of the exhaust ports al, realizing the second phase of the cycle or exhaust phase; this phase takes` place during a relatively short time, but the gases, although being in the expansionV period, have still a high pressure and, passing through, large outlets, escape ata very great speed; the pressure in the working chamber rapidly lowers below atmospheric pressure and, from the time the member 3 has covered the ports al, there begins the third phase illustrated in Fig. 7;;

the piston creates anew partial vacuum. befr hind it realizing this third phase.

In Fig. 8,. the annular space between the piston body and its member Z13 is opposite the inlet ports a2 through which the gaseous -mixture enters, sucked in by the partial 'dimensions of the engine the operationv of which has been previously indicatedy are so chosen that the member 3 cannot uncover the exhaust ports during they suction period.

Vl? ig. 10 shows the .cl'iaracteristic diagram of the cycle realized by the invention and which has just been described'.

Vhat I claim as my invention` and desire to secure by Letters Patent is.:

l; In an internal? combustion engine, a cylinder having a combustion chamber, and inlet and exhaust portsin the wall' thereof,

a piston arranged' in the cylinder' and having a reduced head portion, a sleeve mein ber arranged between the wall of the cylinderv and the reduced portion of said'pistcn, the pistonV and sleeve member having a passage tl'ierebetween communicating with the combustion chamber, said sleeve member being movable relative to the piston, and

means to= limitl the movement of the sleeve member with respect to the piston whereby at each change in. the direction 4of movement of the piston, the inertia of the sleeve. member actsto move the latter axially with respect to thepiston alternately in one direction andk the other toconnect the combustion chamber, through the passage between the: sleeve member and the piston successively withxthe exhaust and; inlet ports in the cylinder wall, whereby: during the power stroke of the piston, there is permitted a brief expansion. of the ignited gases, and,l as-the space between the: piston. and sleeve member registers with the exhaust port, an exhaust at high pressure and high speed of a portion only of the products of combustion, the creation of a partial vacuum in the cylinder resulting at once from the rapid exhaust and from the further movement of the piston, the suction thro-ugh the inlet port of a volume of fresh fuel, and, on the .compression stroke of the piston, compression of the total charge composed in greater part of residual gases and in smaller part of fresh combustible fuel.

2. In an internal combustion engine, a cylinder having a combustion chamber and inlet and exhaust ports in the wall thereof, a piston arranged in the cylinder and having a reduced head head portion ofthe piston defining an inclined shoulder constituting a seat, a sleeve member arranged between the wall of the cylinder'and the reduced portion of `said piston and engageable with the seat thereon, the piston and sleeve member having a Vpassage therebetween communicating with the combustion chamber, said sleeve member vbeing movable relative to the piston, a stop member for limiting the movement of the sleeve member with respect to' the piston ortion, the reducedwhereby at each change in the direction of movement of the piston, the'inertia of the sleeve member acts to move the latter axially with respect to the piston alternately in one direction and the other to connect the combustion chamber, through the passage between the ,sleeve member and the piston successively with the exhaust and inlet ports in the cylinder wall, whereby during the power stroke of the piston, there is permitted a brief expansion of the ignited gases, and, as the spacebetween the piston and sleeve member registers with the exhaust port, an exhaust at high pressure and high speed of a portion only of the products of combustion, the creation of a partial vacuum in the cylinder resulting at once from the rapid exhaust and from the further movement of the piston, the suction through the inlet port of a volume of kfresh fuel, and, on the compression stroke of the piston, compression of the total charge composed in greater part of residual gases and in smaller f part of fresh combustible fuel.v

In testimony whereof I have signed my name to this specification.

LoUIs ANDR NoL; 

